CN108505958A - A kind of drilling rod with built-in hydraulic oil pipe - Google Patents
A kind of drilling rod with built-in hydraulic oil pipe Download PDFInfo
- Publication number
- CN108505958A CN108505958A CN201810424796.1A CN201810424796A CN108505958A CN 108505958 A CN108505958 A CN 108505958A CN 201810424796 A CN201810424796 A CN 201810424796A CN 108505958 A CN108505958 A CN 108505958A
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- joint
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- hole
- flange
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- 239000010720 hydraulic oil Substances 0.000 title claims abstract description 14
- 238000005553 drilling Methods 0.000 title abstract description 16
- 239000003921 oil Substances 0.000 claims abstract description 49
- 238000007789 sealing Methods 0.000 claims abstract description 26
- 238000007569 slipcasting Methods 0.000 claims abstract description 4
- 210000003739 neck Anatomy 0.000 claims description 11
- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract description 8
- 238000010168 coupling process Methods 0.000 abstract description 8
- 238000005859 coupling reaction Methods 0.000 abstract description 8
- 210000002445 nipple Anatomy 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 10
- 239000004568 cement Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 240000009087 Crescentia cujete Species 0.000 description 2
- 235000005983 Crescentia cujete Nutrition 0.000 description 2
- 235000009797 Lagenaria vulgaris Nutrition 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/18—Pipes provided with plural fluid passages
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
A kind of drilling rod with built-in hydraulic oil pipe, including hollow drill pipe, built-in oil pipe combination, Grouting Pipe, upper and lower side baffle ring and upper and lower side sealing ring, Grouting Pipe is fixed on hollow drill pipe inner cavity, two groups of fluid pressure lines disposed in parallel of built-in oil pipe combination are placed in slip casting tube cavity by multiple brackets, upper end is installed in by external headstock in the stepped counterbore of male fittings body, and lower end is installed in by inscribed headstock in male connector socket bottom counterbore；Coupling assembly is fixed on by circlip on external headstock, and quick pin end is arranged in the first coupling；Nipple assembly is fixed on by circlip on inscribed headstock, and guide sleeve is tightened against the second nipple lower end, and endoporus is equipped with butterfly spring, guide rod；First nipple is tightened against guide rod lower end；Quick female connector is set in the interior intermediate step hole of first nipple.The present invention ensures that quick coupling accurately connects, and is effectively improved the sealing performance of hydraulic oil pipe, convenient and simple for operation easy and safe and reliable.
Description
Technical Field
The invention relates to a drill rod, in particular to a drill rod with a built-in hydraulic oil pipe for a hydraulic reamer for foundation construction.
Background
With the construction and development of foundation engineering such as large buildings, high-speed railways, highways, large bridges, urban underground pipe galleries and the like, in order to improve the bearing capacity of pile foundations, a large number of novel bearing piles such as various club-footed piles, calabash piles and the like are adopted, and the pile forming technology has the characteristics of reasonable structure, high pile body material strength, large single-pile bearing capacity, increased uplift resistance, low danger coefficient, short construction period, low engineering cost and the like, so that the pile forming technology is widely applied to pile foundation construction. The construction of various pedestal piles and calabash piles is completed, a large number of static-pressure reaming pile-planting drilling machines are adopted and popularized at present, a super drilling tool can penetrate through hard strata such as sand layers, medium-stroke chemical rock layers and the like, reaming operation can be carried out at the bottom of a pile hole or in the middle of the pile hole after reaming by a reaming bit, a hole larger than the pile is formed, the maximum diameter of the section of a single pile can reach phi 1500mm, and the drilling depth can reach more than 100 m. After the reaming operation of the reaming drilling machine is completed, slurry is injected into the bottom of the pile hole through the inner cavity of the hollow drill rod, and finally precast piles in various forms are pressed into the pile hole, so that the static pressure pile planting technology can improve the bearing capacity of a single pile, reduce the soil squeezing effect, has the functions of low carbon, energy conservation and environment protection, and can be widely applied to future urban construction. To the drilling rod that present hydraulic pressure reaming rig used, in order to satisfy to providing hydraulic power source to the built-in extension hydro-cylinder of reaming drilling tool, the oil feed that sets up on the drilling rod and return oil pipeline have following several kinds of forms and the problem that exists generally: 1) the hydraulic oil pipe arranged in the inner cavity of the drill rod is suspended in the inner hole of the drill rod, and the connection of the drill rod cannot be ensured to be convenient and fast in place when the drill rod needs to be additionally connected along with the increase of the drilling depth; 2) the hydraulic oil pipe is arranged on the outer side of the drill rod, so that the drill rod structure and installation are more complex, the oil pipe is seriously abraded, the sealing performance is poor, and the reaming operation efficiency of the drilling machine is greatly reduced. 3) For example, in a drill rod with an internal oil pipe disclosed in chinese patent CN103206176A, a fixing ring and a retainer ring are disposed at the bottom of a counter bore step at the end face of the upper outer hexagon head and the bottom of a lower inner hexagon socket of each unit drill rod, an oil inlet pipe and an oil return pipe are disposed in parallel in the inner cavity of the drill rod and fixed by a sealing seat disposed on the upper and lower fixing rings, and a quick coupling is screwed into the sealing seat disposed on the upper fixing ring and a quick coupling seat is screwed into the sealing seat disposed on the lower fixing ring. Therefore, when the upper drill rod and the lower drill rod are in butt joint, the quick connectors of the oil inlet pipe and the oil return pipe of the lower drill rod are respectively inserted into the quick connector seats of the oil inlet pipe and the oil return pipe of the upper drill rod. This kind of structure sets up the pattern, cause to advance oil pipe and return to be connected fairly complicacy between oil pipe and the retainer plate, bring very big difficulty for processing, and manufacturing cost is high, still make the product after the installation can not effectively guarantee to advance oil pipe and return the sealing performance of oil pipe in the use, during the use, can take place the cement thick liquid of drilling rod inner chamber often and get into in the oil pipe, cause the reamer bit trouble of drilling rod front end, can influence in time opening and drawing in of expanding the cutting fin at any time, greatly reduced efficiency of construction.
Disclosure of Invention
The invention mainly aims to overcome the defects of the drill rod of the existing hole expanding drill, provides the drill rod with the built-in hydraulic oil pipe, which can effectively ensure the accurate connection of the quick connector, effectively improves the sealing performance of the connection of the hydraulic oil pipe, is convenient to operate, is simple and easy to implement, further improves the operating efficiency of the hydraulic hole expanding drill and reduces the engineering construction cost.
The invention is realized by the following technical scheme:
a drill pipe having an internal hydraulic tubing, comprising: the cavity drilling rod of the male joint body and female joint socket with through-hole, arrange built-in oil pipe combination and slip casting pipe, upper end retaining ring, upper end sealing washer, lower extreme retaining ring and the lower extreme sealing washer that has the support in the cavity drilling rod, wherein:
the male joint body comprises a first step-shaped step positioned in a through hole on the upper end surface of the male joint body, a male joint shaft diameter positioned on the upper outer wall of the male joint body and a first transverse semicircular groove positioned on the middle outer wall of the male joint body; the female joint socket comprises a second step-shaped step, a third step-shaped step, a second transverse semicircular groove and a locking screw hole, wherein the second step-shaped step and the third step-shaped step are positioned in the socket at the lower part of the female joint socket;
the built-in oil pipe combination comprises two groups of hydraulic pipelines which are arranged in parallel and are provided with an outer joint assembly, an inner joint assembly and a connecting steel pipe between the outer joint assembly and the inner joint assembly, an outer joint seat, an inner joint seat and a plurality of brackets; wherein,
the outer joint seat comprises a base with two symmetrical first jacks and first grouting holes, a flange which is connected above the base and is provided with opposite first notches, an outer seat flange groove positioned on the excircle of the flange, and an outer seat flange pin hole and an outer seat flange screw hole on the end face of the flange;
the outer joint assembly comprises a first outer joint, a quick male joint, an elastic check ring and a first O-shaped ring; the first outer joint is provided with a convex ring at the upper part of the outer wall thereof, and is placed on the bottom end of a base socket of the outer joint seat through the convex ring when being installed in the outer joint seat, and the outer wall thereof is divided into an upper first journal and a lower second journal by taking the convex ring as a boundary; the first outer joint also comprises an outer upper end counter bore serving as an inner bore at the corresponding position of the first journal, an outer lower end counter bore serving as an inner bore at the corresponding position of the second journal, and an outer groove and an outer annular groove which are arranged on the outer wall opposite to the base of the outer joint seat;
the inner joint seat comprises a base with two symmetrical second inserting ports and second grouting holes, a flange which is connected below the base and is provided with a second gap opposite to the first gap, an inner seat flange groove positioned on the excircle of the flange, and an inner seat flange pin hole and an inner seat flange screw hole on the end face of the flange; wherein,
the inner joint assemblies respectively comprise a first inner joint, a guide sleeve, a guide rod, a second inner joint, a butterfly spring, a quick female joint, an elastic check ring, a first O-shaped ring, a framework seal, a second O-shaped ring and a third O-shaped ring;
the second inner joint is provided with a convex ring at the upper part of the outer wall thereof, when the second inner joint is arranged in the inner joint seat, the second inner joint is placed on the top end of the base socket of the inner joint seat through the convex ring, and the outer wall thereof is divided into an upper fourth shaft neck and a lower inner and outer threads by taking the convex ring as a boundary; the second inner joint also comprises inner two upper end counter bores which are arranged in the inner hole at the corresponding position of the fourth shaft neck, and an inner two grooves and an inner two ring grooves which are arranged on the outer wall opposite to the base of the inner joint seat;
the guide sleeve is provided with inner threads, a middle through hole and a lower end counter bore from bottom to top in the inner hole, and also comprises an inner sleeve groove and an inner sleeve ring groove which are positioned on the inner wall of the lower end counter bore;
the guide rod is a stepped rod with a head and is provided with a rod journal, a rod thread and a rod through hole;
the inner hole of the first inner joint is internally provided with an inner ring groove which comprises an inner upper end counter bore, an inner internal thread, an inner middle step hole and an inner lower end counter bore, and is positioned on the inner wall of the inner upper end counter bore;
the plurality of brackets are arranged in the grouting pipes and are provided with two symmetrical pipeline through holes, two symmetrical third grouting holes and bracket ring grooves;
the method is characterized in that:
the grouting pipe is placed in the inner cavity of the hollow drill rod by utilizing a bracket and welding and fixing, and two ends of the grouting pipe are respectively communicated with inner holes of the male joint body and the female joint socket;
when the male joint body of one drill rod is inserted into the female joint socket of the other drill rod, the neck of the male joint is arranged on the third step-shaped step of the female joint socket in a matching manner, the first transverse semicircular groove on the outer wall of the male joint body and the second transverse semicircular groove on the inner wall of the female joint socket form a locking pin hole which is oppositely combined, the male joint body is locked in the female joint socket after the joint bolt is inserted, and finally the male joint body is completely locked in the female joint socket after the locking bolt is screwed in the locking screw hole, so that the upper drill rod and the lower drill rod are firmly connected;
the built-in oil pipe combination is arranged in an inner hole of the grouting pipe, two connecting oil pipes of the built-in oil pipe combination penetrate through two symmetrical pipeline through holes of a plurality of brackets and are fixed on the outer wall of the connecting oil pipe, and bracket ring grooves of the brackets are arranged in the inner hole of the grouting pipe after being provided with O-shaped sealing rings; the upper end of the built-in oil pipe combination is fixed at the bottom of the first step-shaped step of the male joint body in a mode of installing an upper end check ring on the outer side surface of the outer joint seat of the built-in oil pipe combination, an upper end sealing ring is installed in a groove of the outer seat flange, and an outer seat flange pin hole and an outer seat flange screw hole on the end surface of the flange are respectively positioned by a positioning pin and fastened by a screw; the lower end of the female joint is fixed at the bottom of a second-step of a female joint socket in a mode of installing a lower end check ring on the outer side surface of an inner joint seat, a lower end sealing ring is installed in a groove of an inner seat flange, and an inner seat flange pin hole and an inner seat flange screw hole on the end surface of the flange are respectively positioned by a positioning pin and fastened by a screw;
the two groups of hydraulic pipelines are respectively formed by connecting a connecting oil pipe, an outer joint assembly and an inner joint assembly, and two ends of the connecting oil pipe are respectively and fixedly arranged in an outer lower end counter bore of the first outer joint and inner two upper end counter bores of the second inner joint;
the outer joint assemblies of the two groups of hydraulic pipelines are respectively inserted into two symmetrical first inserting ports in the outer joint seat through second journals of first outer joints and then fixed in a mode that elastic check rings are installed in an outer groove, and first O-shaped rings are installed in an outer ring groove; a quick male connector is arranged in a counter bore at the upper end outside the first outer connector;
the inner joint assemblies of the two groups of hydraulic pipelines are fixed in a mode that fourth shaft necks of second inner joints are respectively inserted into two symmetrical second inserting ports in the inner joint seat and elastic check rings are arranged in two inner grooves, and first O-shaped rings are arranged in two inner ring grooves;
the guide rod penetrates through an inner internal thread in a sleeve lower end counter bore of the guide sleeve and an inner joint inner bore through a rod external thread at the lower end of the guide rod, a rod shaft neck of the guide rod is arranged in the sleeve lower end counter bore of the guide sleeve, and a sleeve inner groove and a sleeve inner ring groove of the sleeve lower end counter bore are respectively provided with a framework seal and a third O-shaped ring;
the butterfly spring is formed by folding a group of 2 pieces and folding a plurality of groups of the pieces, and the two pieces are arranged in the sleeve middle through hole of the guide sleeve and positioned between the upper end surface of the guide rod and the lower end surface of the second inner joint;
the guide sleeve is screwed on the inner and outer threads at the lower end of the second inner joint through the inner threads at the upper end of the guide sleeve;
a second O-shaped ring is arranged in an inner annular groove of a counter bore at the upper end in the first inner joint; and a quick female joint is arranged in a middle step hole in the first inner joint.
The invention can be characterized in that the parallelism tolerance requirement of the axial center lines of the two hydraulic pipelines relative to the flange excircle of the outer joint seat and the inner joint seat is 0.08-0.10 mm.
The invention can also be that after the belleville spring in the inner joint assembly is assembled in the sleeve middle through hole of the guide sleeve, the initial pressing force is more than or equal to 2.0kN, and the pressing force is more than or equal to 4.0kN after the belleville spring is compressed for 2.10 mm.
Drawings
FIG. 1 is a schematic view of the drill pipe structure of the present invention with a built-in hydraulic tubing;
FIG. 2 is a sectional view taken along line B-B of FIG. 1;
FIG. 3 is a sectional view taken along line C-C of FIG. 2;
FIG. 4 is a schematic diagram of the internal oil pipe assembly of the drill pipe with internal hydraulic oil pipe according to the present invention;
3 FIG. 3 5 3 is 3 a 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3 of 3 FIG. 3 4 3; 3
FIG. 6 is a top view of FIG. 4;
fig. 7 is a bottom view of fig. 4.
Detailed Description
The drill rod with built-in hydraulic oil pipe of the present invention is further described with reference to the accompanying drawings.
A drill pipe having an internal hydraulic tubing, comprising: hollow drill pipe 1 with a male coupling body 11 and a female coupling socket 12 of through-going holes, a built-in tubing set 2 arranged in the hollow drill pipe and a slip casting pipe 3 with a holder 32, an upper end collar 248, an upper end sealing ring 249, a lower end collar 258 and a lower end sealing ring 259, wherein:
the male joint body 11 comprises a first step 112 positioned in the through hole on the upper end surface, a male joint journal 113 positioned on the outer wall of the upper part and a first transverse semicircular groove 114 positioned on the outer wall of the middle part; the female connector receptacle 12 includes a second stepped step 122, a third stepped step 123 in a lower receptacle or socket thereof, a second transverse semi-circular groove 124 in a medial wall thereof, and a locking screw hole 125 therethrough.
The built-in oil pipe assembly 2 comprises two groups of hydraulic pipelines 27, 27' which are arranged in parallel and are provided with an outer joint assembly, an inner joint assembly and a connecting steel pipe 26 between the outer joint assembly and the inner joint assembly, an outer joint seat 240, an inner joint seat 250 and a plurality of brackets 22; wherein the outer joint base 240 comprises a base having two symmetrical first sockets 2401, 2401 ' and first grouting holes 2403, 2403 ' and a flange connected above the base and having opposite first notches 2402, 2402 ' thereon, typically, the first notches further extend partially downward into and at opposite sides of an outer wall of a peripheral surface of the base; the flange is also provided with an outer seat flange groove 2406 positioned on the excircle of the flange, an outer seat flange pin hole 2404 and an outer seat flange screw hole 2405 on the end face of the flange; the outer joint assembly comprises a first outer joint 245, a quick male joint 246, a circlip 44 and a first O-ring 55; the first outer joint 245 is provided with a collar at an upper portion of an outer wall thereof, rests on a bottom end of the base socket of the outer joint holder 240 by the collar when installed therein, and is divided into an upper first journal 2453 and a lower second journal 2452 at an outer wall thereof with the collar as a boundary; the first outer joint 245 further includes an outer upper end counterbore 2451 in the inner bore at a location corresponding to the first journal 2453, an outer lower end counterbore 2454 in the inner bore at a location corresponding to the second journal 2452, and an outer groove 24522 and an outer ring groove 245721 in the outer wall opposite the base of the outer joint seat 240.
The inner joint block 250 comprises a base having two symmetrical second insertion holes 2501, 2501 ' and second injection holes 2503, 2503 ' and a flange connected below the base and having opposite second notches 2502, 2502 ' thereon, typically, the first notch further extends partially downward into and on opposite sides of the outer wall of the periphery of the base; the flange also has an inner seat flange groove 2506 located on the outer circle of the flange and an inner seat flange pin hole 2504 and an inner seat flange screw hole 2505 on the end face of the flange; the nipple assembly comprises a first nipple 251, a guide sleeve 253, a guide rod 252, a second nipple 255, a belleville spring 254, a quick female coupling 256, a circlip 44, a first O-ring 55, a skeleton seal 66, a second O-ring 77 and a third O-ring 88; the second inner joint 255 is provided with a collar at an upper portion of an outer wall thereof, rests on a top end of a base socket of the inner joint housing through the collar when mounted in the inner joint housing 250, and is divided into an upper fourth journal 2552 and a lower inner and outer thread 2553 at an outer wall thereof with the collar as a boundary; the second inner joint 255 further comprises an inner two upper end counter bore 2555 in the inner bore at the corresponding position of the fourth shaft neck 2552, and an inner two groove 25522 and an inner two ring groove 25521 which are arranged on the outer wall opposite to the base of the inner joint seat 250; the guide sleeve 253 is sequentially provided with a sleeve inner thread 2533, a sleeve middle through hole 2532 and a sleeve lower end counter bore 2531 in the inner hole of the guide sleeve 253 from bottom to top, and the guide sleeve 253 further comprises a sleeve inner groove 25311 and a sleeve inner ring groove 25312 which are positioned on the inner wall of the sleeve lower end counter bore 2531; the guide rod 252 is a stepped rod with a head, and has a rod axial neck 2522, a rod thread 2521, and a rod through hole 2523; an inner upper end counter bore 2514, an inner internal thread 2513, an inner middle step hole 2512 and an inner lower end counter bore 2511 are arranged in the inner hole of the first inner joint 251, and the inner joint further comprises an inner annular groove 25141 positioned on the inner wall of the inner upper end counter bore 2514.
A plurality of carriers 22 are installed in the grout pipe 3 and have two symmetrical pipe through holes 221, 221 ', two symmetrical third grout holes 223, 223', and carrier ring grooves 220.
The grouting pipe 3 is fixed by welding and placed in the inner cavity of the hollow drill rod 1 by utilizing a bracket 32, and two ends of the grouting pipe are respectively communicated with inner holes of the male joint body 11 and the female joint socket 12; when the male joint body 11 of one drill rod is inserted into the female joint socket 12 of another drill rod, the male joint journal 113 is fittingly placed on the third step 123 of the female joint socket 12, and the first transverse semicircular groove 114 on the outer wall of the male joint body 11 and the second transverse semicircular groove 124 on the inner wall of the female joint socket 12 form a locking pin hole which is oppositely matched, the male joint body 11 is locked after the joint pin is inserted, and finally the male joint body 11 is completely locked in the female joint socket 12 after the locking bolt is screwed into the locking pin hole, so that the upper drill rod and the lower drill rod are firmly connected.
The built-in oil pipe assembly 2 is arranged in an inner hole of the grouting pipe 3, two connecting oil pipes 26 of the built-in oil pipe assembly 2 penetrate through two symmetrical pipeline through holes 221, 2 and 21' of the brackets 22 and are fixed on the outer wall of the connecting oil pipe 26, and bracket ring grooves 220 of the brackets 22 are arranged in the inner hole of the grouting pipe 3 after being provided with O-shaped sealing rings; the upper end of the built-in oil pipe assembly 2 is fixed at the bottom of the first step 112 of the male joint body 11 by installing an upper end retainer ring 248 on the outer side surface of the outer joint seat 240, an upper end sealing ring 249 is installed on an outer seat flange groove 2406, and an outer seat flange pin hole 2404 and an outer seat flange screw hole 2405 on the flange end surface are respectively positioned by a positioning pin and fastened by a screw; the lower end of the inner joint seat is fixed at the bottom of the second step-shaped step 122 of the female joint socket 12 in a mode that a lower end retainer ring 2501 is installed on the outer side surface of the inner joint seat 250, a lower end sealing ring 259 is installed on an inner seat flange groove 2506 of the inner joint seat, and an inner seat flange pin hole 2504 and an inner seat flange screw hole 2505 in the flange end surface of the inner joint seat are positioned by a positioning pin and fastened by a screw respectively.
The two groups of hydraulic pipelines 27 and 27' are respectively formed by connecting an oil connecting pipe 26, an outer joint assembly and an inner joint assembly, and specifically, two ends of the oil connecting pipe 26 are respectively and fixedly installed in an outer lower end counter bore 2454 of the first outer joint 245 and an inner two upper end counter bore 2555 of the second inner joint 255; in addition, the outer joint assemblies of the two sets of hydraulic lines 27, 27 'are all fixed by inserting the second journal 2452 of the first outer joint 245 into two symmetrical first spigots 2401, 2401' in the outer joint seat 240 respectively and installing elastic check rings 44 in an outer groove 24522, and installing a first O-ring 55 in the outer groove 2451; a quick male joint 246 is arranged in an outer upper end counter bore 2451 of the first outer joint 245; the inner joint assemblies of the two sets of hydraulic lines 27, 27 'are all fixed by inserting the fourth journal 2552 of the second inner joint 255 into the two symmetrical second sockets 2501, 2501' of the inner joint seat 250, and installing the elastic check rings 44 in the inner two grooves 25522, and installing the first O-ring 55 in the inner two ring grooves 25521.
The parallelism tolerance of the axial center lines of the two hydraulic lines 27, 27' relative to the outer circumferences of the flanges of the outer joint seat 240 and the inner joint seat 250 is required to be 0.08-0.10 mm. When the upper drill rod and the lower drill rod are butted, the quick male connectors 246 of the two hydraulic pipelines 27 and 27 'in the lower drill rod are quickly and accurately inserted into the quick female connectors 256 of the two hydraulic pipelines 27 and 27' in the upper drill rod, and the pipeline sealing performance is effectively improved.
The guide rod 252 is screwed with a rod external thread 2521 at the lower end thereof through a sleeve lower end counter bore 2531 of the guide sleeve 253 and an internal thread 2513 in the inner hole of the first inner joint 251, a rod shaft neck 2522 is arranged in the sleeve lower end counter bore 2531 of the guide sleeve 253, and the sleeve inner groove 25311 and the sleeve inner annular groove 25312 of the sleeve lower end counter bore 2531 are respectively provided with a framework seal 66 and a third O-ring 88; the belleville spring 254 is formed by folding a group of 2 pieces, folding a plurality of groups of 2 pieces and then oppositely combining the 2 pieces, is arranged in the sleeve middle through hole 2532 of the guide sleeve 253 and is positioned between the upper end surface of the guide rod 252 and the lower end surface of the second inner joint 255; the guide sleeve 253 is screwed on the inner and outer threads 2553 at the lower end of the second inner joint 255 through the sleeve threads 2533 at the upper end of the guide sleeve 253; an inner annular groove 25141 of an inner upper end counter bore 2514 of the first inner joint 251 is provided with a second O-ring 77; the female quick connector 256 is disposed in an inner one of the intermediate stepped bores 2512 of the first inner connector 251.
After the belleville spring 254 in the inner joint assembly is assembled in the sleeve middle through hole 2532 of the guide sleeve 253, the initial pressing force is more than or equal to 2.0kN, and the pressing force is more than or equal to 4.0kN after 2.10mm of compression. Therefore, when the upper drill rod and the lower drill rod are butted, the quick male connectors 246 of the two hydraulic pipelines 27 and 27 'in the lower drill rod are inserted into the quick female connectors 256 of the two hydraulic pipelines 27 and 27' in the upper drill rod to be quickly and accurately inserted in place and be butted fully and reliably, and the quick male connectors 246 can be timely separated from the quick female connectors 256 when being separated from the quick female connectors 256, so that the drill rods can be conveniently detached, and the sealing performance of the hydraulic pipelines is effectively improved.
When two hollow drill rods are butted, after the quick male joint 246 in the lower hollow drill rod built-in oil pipe combination 2 at the lower part is inserted into the quick female joint 256 in the upper hollow drill rod built-in oil pipe combination 2 at the upper part, the first outer joint 245 pushes the first inner joint 251 and the guide rod 252 connected with the first inner joint upwards to apply an acting force to the belleville spring 254 and keep the acting force as a compensation stroke, which is favorable for the communication of the built-in oil pipes; the inner lower counterbore 2511 of the first inner joint 251 acts as a pilot hole and mates with the first journal 2453 of the first outer joint 245 when the quick male joint is inserted into the quick female joint.
In the grouting pipe 3 arranged in the inner cavity of the hollow drill rod 1, two symmetrical third grouting holes 223, 223 ' on a plurality of brackets 22 fixed on two groups of built-in oil pipes 27, 27 ' form a communicated conveying pipeline, and the grouting pipeline of the whole hollow drill rod is communicated through two symmetrical first grouting holes 2403, 2403 ' arranged on the base of the outer joint seat 240 and first notches 2402, 2402 ' opposite to the outer wall and the flange above the base, and two symmetrical second inserting holes 2501, 2501 ' arranged on the base of the inner joint seat 250 and second notches 2502, 2502 ' opposite to the outer wall and the flange above the base, and the second grouting holes 2503, 2503 ' connected to the outer wall and the flange above the base. And (3) starting grouting process construction after hole expansion operation is completed, injecting cement slurry with a certain proportion into the pre-drilled hole, pulling out all drill rods, pressing the precast pile into the pre-drilled hole, and completing pile planting operation after the cement slurry and the precast pile are completely solidified.
The drill rod with the built-in hydraulic oil pipe combination ensures the accurate connection of the male and female quick connectors, effectively improves the sealing performance of hydraulic pipeline connection, is convenient to operate, simple, feasible, safe and reliable, further improves the operation efficiency of the hole expanding drilling machine, and greatly reduces the engineering construction cost.
Various changes and modifications may be made without departing from the general inventive concept, but they are within the scope of the present invention as long as they are equivalent or similar to the present invention.
Claims (3)
1. A drill pipe having an internal hydraulic tubing, comprising: hollow drill rod (1) with male joint body (11) and female joint socket (12) of through-hole, arrange built-in oil pipe combination (2) and slip casting pipe (3), upper end retaining ring (248), upper end sealing washer (249), lower extreme retaining ring (258) and lower extreme sealing washer (259) that have support (32) in the hollow drill rod, wherein:
the male joint body (11) comprises a first step-shaped step (112) positioned in a through hole on the upper end surface of the male joint body, a male joint journal (113) positioned on the outer wall of the upper part of the male joint body and a first transverse semicircular groove (114) positioned on the outer wall of the middle part of the male joint body; the female joint socket (12) comprises a second step-shaped step (122) and a third step-shaped step (123) which are positioned in the socket at the lower part of the female joint socket, a second transverse semicircular groove (124) which is positioned on the inner wall of the middle part of the female joint socket, and a locking screw hole (125) which is communicated with the second transverse semicircular groove;
the built-in oil pipe combination (2) comprises two groups of hydraulic pipelines (27, 27') which are arranged in parallel and are provided with an outer joint assembly, an inner joint assembly and a connecting steel pipe (26) between the outer joint assembly and the inner joint assembly, an outer joint seat (240), an inner joint seat (250) and a plurality of brackets (22); wherein,
the outer joint seat (240) comprises a base with two symmetrical first inserting holes (2401, 2401 ') and first grouting holes (2403, 2403 '), a flange which is connected above the base and is provided with opposite first notches (2402, 2402 '), an outer seat flange groove (2406) positioned on the outer circle of the flange, and an outer seat flange pin hole (2404) and an outer seat flange screw hole (2405) on the end face of the flange;
the outer joint assembly comprises a first outer joint (245), a quick male joint (246), a circlip (44) and a first O-ring (55); the first outer joint (245) is provided with a convex ring at the upper part of the outer wall thereof, when being installed in the outer joint seat (240), the first outer joint is rested on the bottom end of the base socket of the outer joint seat through the convex ring, and the outer wall thereof is divided into an upper first journal (2453) and a lower second journal (2452) by taking the convex ring as a boundary; the first outer joint (245) also comprises an outer upper end counter bore (2451) which is used as an inner bore at the corresponding position of the first journal (2453), an outer lower end counter bore (2454) which is used as an inner bore at the corresponding position of the second journal (2452), and an outer groove (24522) and an outer ring groove (245721) which are arranged on the outer wall opposite to the base of the outer joint seat (240);
the inner joint seat (250) comprises a base with two symmetrical second inserting openings (2501, 2501 ') and second grouting holes (2503, 2503 '), a flange which is connected below the base and is provided with opposite second notches (2502, 2502 '), and an inner seat flange groove (2506) positioned on the outer circle of the flange, an inner seat flange pin hole (2504) and an inner seat flange screw hole (2505) on the end face of the flange;
the inner joint assemblies respectively comprise a first inner joint (251), a guide sleeve (253), a guide rod (252), a second inner joint (255), a butterfly spring (254), a quick female joint (256), an elastic retainer ring (44), a first O-shaped ring (55), a framework seal (66), a second O-shaped ring (77) and a third O-shaped ring (88); wherein,
the second inner joint (255) is provided with a convex ring at the upper part of the outer wall, when the second inner joint is arranged in the inner joint seat (250), the second inner joint is placed on the top end of the base socket of the inner joint seat through the convex ring, and the outer wall of the second inner joint is divided into an upper fourth journal (2552) and a lower inner and outer thread (2553) by taking the convex ring as a boundary; the second inner joint (255) also comprises two inner upper end counter bores (2555) which are taken as corresponding positions of the fourth shaft neck (2552) in the inner hole, and two inner grooves (25522) and two inner ring grooves (25521) which are arranged on the outer wall opposite to the base of the inner joint seat (250);
the inner hole of the guide sleeve (253) is sequentially provided with an inner sleeve thread (2533), a sleeve middle through hole (2532) and a sleeve lower end counter bore (2531) from bottom to top, and the guide sleeve (253) also comprises a sleeve inner groove (25311) and a sleeve inner ring groove (25312) which are positioned on the inner wall of the sleeve lower end counter bore (2531);
the guide rod (252) is a stepped rod with a head, and has a rod journal (2522), a rod thread (2521), and a rod through hole (2523);
an inner upper end counter bore (2514), an inner internal thread (2513), an inner middle step hole (2512) and an inner lower end counter bore (2511) are arranged in an inner hole of the first inner joint (251), and the inner joint further comprises an inner annular groove (25141) positioned on the inner wall of the inner upper end counter bore (2514);
a plurality of brackets (22) are installed in the grouting pipe (3) and have two symmetrical pipe through holes (221, 221 '), two symmetrical third grouting holes (223, 223'), and bracket ring grooves (220);
the method is characterized in that:
the grouting pipe (3) is fixedly arranged in the inner cavity of the hollow drill rod (1) by welding through a bracket (32), and two ends of the grouting pipe are respectively communicated with inner holes of the male connector body (11) and the female connector socket (12);
when the male joint body (11) of one drill rod is inserted into the female joint socket (12) of the other drill rod, the male joint journal (113) is fittingly arranged on the third step-shaped step (123) of the female joint socket (12), a first transverse semicircular groove (114) on the outer wall of the male joint body (11) and a second transverse semicircular groove (124) on the inner wall of the female joint socket (12) form oppositely-matched locking pin holes, the locking pin is inserted and locked, and finally, after a locking bolt is screwed into the locking pin holes, the joint male body (11) is completely locked in the female joint socket (12), so that the upper drill rod and the lower drill rod are firmly connected;
the built-in oil pipe combination (2) is arranged in an inner hole of the grouting pipe (3), two connecting oil pipes (26) of the built-in oil pipe combination pass through two symmetrical pipeline through holes (221, 221') of a plurality of brackets (22) and are fixed on the outer wall of the connecting oil pipe (26), and bracket ring grooves (220) of the brackets (22) are arranged in the inner hole of the grouting pipe (3) after being provided with O-shaped sealing rings; the upper end of the built-in oil pipe combination (2) is fixed at the bottom of a first step-shaped step (112) of a male joint body (11) in a mode that an upper end check ring (248) is arranged on the outer side surface of an outer joint seat (240), an upper end sealing ring (249) is arranged in an outer seat flange groove (2406), and an outer seat flange pin hole (2404) and an outer seat flange screw hole (2405) on the flange end surface of the outer seat flange are respectively positioned by a positioning pin and fastened by a screw; the lower end of the inner joint seat is fixed at the bottom of a second step (122) of a female joint socket (12) in a mode of installing a lower end retainer ring (2501) on the outer side surface of an inner joint seat (250), a lower end sealing ring (259) is installed in an inner seat flange groove (2506), and an inner seat flange pin hole (2504) and an inner seat flange screw hole (2505) on the flange end surface of the inner seat flange seat are positioned by a positioning pin and fastened by a screw respectively;
the two groups of hydraulic pipelines (27, 27') are respectively formed by connecting a connecting oil pipe (26), an outer joint assembly and an inner joint assembly, and two ends of the connecting oil pipe (26) are respectively and fixedly arranged in an outer lower end counter bore (2454) of the first outer joint (245) and an inner two upper end counter bores (2555) of the second inner joint (255);
the outer joint assemblies of the two groups of hydraulic pipelines (27, 27 ') are fixed by respectively inserting second journals (2452) of first outer joints (245) into two symmetrical first spigots (2401, 2401') in the outer joint seat (240) and installing elastic check rings (44) in an outer groove (24522), and first O-shaped rings (55) are installed in the outer ring groove (24583); a quick male connector (246) is arranged in a counter bore (2451) at the upper end of the first outer connector (245);
the inner joint assemblies of the two groups of hydraulic pipelines (27, 27 ') are all fixed in a mode that after the fourth shaft necks (2552) of the second inner joint (255) are respectively inserted into the two symmetrical second inserting ports (2501, 2501') in the inner joint seat (250), elastic check rings (44) are installed in the inner two grooves (25522), and first O-shaped rings (55) are installed in the inner two ring grooves (25521);
the guide rod (252) passes through a sleeve lower end counter bore (2531) of the guide sleeve (253) through a rod external thread (2521) at the lower end of the guide rod and is screwed with an internal thread (2513) in an inner hole of the first inner joint (251), a rod shaft neck (2522) of the guide rod is arranged in the sleeve lower end counter bore (2531) of the guide sleeve (253), and an inner sleeve groove (25311) and an inner sleeve annular groove (25312) of the sleeve lower end counter bore (2531) are respectively provided with a framework seal (66) and a third O-shaped ring (88);
the butterfly spring (254) is formed by folding a group of 2 pieces and a plurality of groups of pieces after folding, and the two pieces are arranged in a sleeve middle through hole (2532) of the guide sleeve (253) and positioned between the upper end surface of the guide rod (252) and the lower end surface of the second inner joint (255);
the guide sleeve (253) is screwed on the inner and outer threads (2553) at the lower end of the second inner joint (255) through sleeve inner threads (2533) at the upper end of the guide sleeve;
an inner annular groove (25141) of an inner upper end counter bore (2514) of the first inner joint (251) is provided with a second O-shaped ring (77); a quick female joint (256) is arranged in an inner middle stepped hole (2512) of the first inner joint (251).
2. Drill pipe with built-in hydraulic oil pipe according to claim 1, characterized in that the axial centre lines of the two hydraulic lines (27, 27') have a parallelism tolerance requirement of 0.08-0.10mm with respect to the flange outer circles of the outer joint seat (240) and the inner joint seat (250).
3. The drill pipe with an internal hydraulic oil pipe as claimed in claim 1, wherein the belleville spring (254) of the inner joint assembly is assembled into the sleeve middle through hole (2532) of the guide sleeve (253) and has an initial pressing force of 2.0kN or more and a pressing force of 4.0kN or more after 2.10mm of recompression.
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| CN201810424796.1A CN108505958B (en) | 2018-05-07 | 2018-05-07 | Drill rod with built-in hydraulic oil pipe |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810424796.1A CN108505958B (en) | 2018-05-07 | 2018-05-07 | Drill rod with built-in hydraulic oil pipe |
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| CN109025844A (en) * | 2018-10-09 | 2018-12-18 | 尚贤菊 | The drilling rod connection structure of pile-driving machine |
| CN110158583A (en) * | 2019-04-19 | 2019-08-23 | 铁三院(天津)工程有限公司 | Comprehensive rotary-cut mix (ARM) pile driving construction device and construction method |
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